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Diffstat (limited to 'src/cmd/ld/elf.h')
| -rw-r--r-- | src/cmd/ld/elf.h | 989 |
1 files changed, 989 insertions, 0 deletions
diff --git a/src/cmd/ld/elf.h b/src/cmd/ld/elf.h new file mode 100644 index 000000000..c63df2241 --- /dev/null +++ b/src/cmd/ld/elf.h @@ -0,0 +1,989 @@ +/* + * Derived from: + * $FreeBSD: src/sys/sys/elf32.h,v 1.8.14.1 2005/12/30 22:13:58 marcel Exp $ + * $FreeBSD: src/sys/sys/elf64.h,v 1.10.14.1 2005/12/30 22:13:58 marcel Exp $ + * $FreeBSD: src/sys/sys/elf_common.h,v 1.15.8.1 2005/12/30 22:13:58 marcel Exp $ + * $FreeBSD: src/sys/alpha/include/elf.h,v 1.14 2003/09/25 01:10:22 peter Exp $ + * $FreeBSD: src/sys/amd64/include/elf.h,v 1.18 2004/08/03 08:21:48 dfr Exp $ + * $FreeBSD: src/sys/arm/include/elf.h,v 1.5.2.1 2006/06/30 21:42:52 cognet Exp $ + * $FreeBSD: src/sys/i386/include/elf.h,v 1.16 2004/08/02 19:12:17 dfr Exp $ + * $FreeBSD: src/sys/powerpc/include/elf.h,v 1.7 2004/11/02 09:47:01 ssouhlal Exp $ + * $FreeBSD: src/sys/sparc64/include/elf.h,v 1.12 2003/09/25 01:10:26 peter Exp $ + * + * Copyright (c) 1996-1998 John D. Polstra. All rights reserved. + * Copyright (c) 2001 David E. O'Brien + * Portions Copyright 2009 The Go Authors. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +/* + * ELF definitions that are independent of architecture or word size. + */ + +/* + * Note header. The ".note" section contains an array of notes. Each + * begins with this header, aligned to a word boundary. Immediately + * following the note header is n_namesz bytes of name, padded to the + * next word boundary. Then comes n_descsz bytes of descriptor, again + * padded to a word boundary. The values of n_namesz and n_descsz do + * not include the padding. + */ + +typedef struct { + uint32 n_namesz; /* Length of name. */ + uint32 n_descsz; /* Length of descriptor. */ + uint32 n_type; /* Type of this note. */ +} Elf_Note; + +/* Indexes into the e_ident array. Keep synced with + http://www.sco.com/developer/gabi/ch4.eheader.html */ +#define EI_MAG0 0 /* Magic number, byte 0. */ +#define EI_MAG1 1 /* Magic number, byte 1. */ +#define EI_MAG2 2 /* Magic number, byte 2. */ +#define EI_MAG3 3 /* Magic number, byte 3. */ +#define EI_CLASS 4 /* Class of machine. */ +#define EI_DATA 5 /* Data format. */ +#define EI_VERSION 6 /* ELF format version. */ +#define EI_OSABI 7 /* Operating system / ABI identification */ +#define EI_ABIVERSION 8 /* ABI version */ +#define OLD_EI_BRAND 8 /* Start of architecture identification. */ +#define EI_PAD 9 /* Start of padding (per SVR4 ABI). */ +#define EI_NIDENT 16 /* Size of e_ident array. */ + +/* Values for the magic number bytes. */ +#define ELFMAG0 0x7f +#define ELFMAG1 'E' +#define ELFMAG2 'L' +#define ELFMAG3 'F' +#define ELFMAG "\177ELF" /* magic string */ +#define SELFMAG 4 /* magic string size */ + +/* Values for e_ident[EI_VERSION] and e_version. */ +#define EV_NONE 0 +#define EV_CURRENT 1 + +/* Values for e_ident[EI_CLASS]. */ +#define ELFCLASSNONE 0 /* Unknown class. */ +#define ELFCLASS32 1 /* 32-bit architecture. */ +#define ELFCLASS64 2 /* 64-bit architecture. */ + +/* Values for e_ident[EI_DATA]. */ +#define ELFDATANONE 0 /* Unknown data format. */ +#define ELFDATA2LSB 1 /* 2's complement little-endian. */ +#define ELFDATA2MSB 2 /* 2's complement big-endian. */ + +/* Values for e_ident[EI_OSABI]. */ +#define ELFOSABI_NONE 0 /* UNIX System V ABI */ +#define ELFOSABI_HPUX 1 /* HP-UX operating system */ +#define ELFOSABI_NETBSD 2 /* NetBSD */ +#define ELFOSABI_LINUX 3 /* GNU/Linux */ +#define ELFOSABI_HURD 4 /* GNU/Hurd */ +#define ELFOSABI_86OPEN 5 /* 86Open common IA32 ABI */ +#define ELFOSABI_SOLARIS 6 /* Solaris */ +#define ELFOSABI_AIX 7 /* AIX */ +#define ELFOSABI_IRIX 8 /* IRIX */ +#define ELFOSABI_FREEBSD 9 /* FreeBSD */ +#define ELFOSABI_TRU64 10 /* TRU64 UNIX */ +#define ELFOSABI_MODESTO 11 /* Novell Modesto */ +#define ELFOSABI_OPENBSD 12 /* OpenBSD */ +#define ELFOSABI_OPENVMS 13 /* Open VMS */ +#define ELFOSABI_NSK 14 /* HP Non-Stop Kernel */ +#define ELFOSABI_ARM 97 /* ARM */ +#define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */ + +#define ELFOSABI_SYSV ELFOSABI_NONE /* symbol used in old spec */ +#define ELFOSABI_MONTEREY ELFOSABI_AIX /* Monterey */ + +/* e_ident */ +#define IS_ELF(ehdr) ((ehdr).e_ident[EI_MAG0] == ELFMAG0 && \ + (ehdr).e_ident[EI_MAG1] == ELFMAG1 && \ + (ehdr).e_ident[EI_MAG2] == ELFMAG2 && \ + (ehdr).e_ident[EI_MAG3] == ELFMAG3) + +/* Values for e_type. */ +#define ET_NONE 0 /* Unknown type. */ +#define ET_REL 1 /* Relocatable. */ +#define ET_EXEC 2 /* Executable. */ +#define ET_DYN 3 /* Shared object. */ +#define ET_CORE 4 /* Core file. */ +#define ET_LOOS 0xfe00 /* First operating system specific. */ +#define ET_HIOS 0xfeff /* Last operating system-specific. */ +#define ET_LOPROC 0xff00 /* First processor-specific. */ +#define ET_HIPROC 0xffff /* Last processor-specific. */ + +/* Values for e_machine. */ +#define EM_NONE 0 /* Unknown machine. */ +#define EM_M32 1 /* AT&T WE32100. */ +#define EM_SPARC 2 /* Sun SPARC. */ +#define EM_386 3 /* Intel i386. */ +#define EM_68K 4 /* Motorola 68000. */ +#define EM_88K 5 /* Motorola 88000. */ +#define EM_860 7 /* Intel i860. */ +#define EM_MIPS 8 /* MIPS R3000 Big-Endian only. */ +#define EM_S370 9 /* IBM System/370. */ +#define EM_MIPS_RS3_LE 10 /* MIPS R3000 Little-Endian. */ +#define EM_PARISC 15 /* HP PA-RISC. */ +#define EM_VPP500 17 /* Fujitsu VPP500. */ +#define EM_SPARC32PLUS 18 /* SPARC v8plus. */ +#define EM_960 19 /* Intel 80960. */ +#define EM_PPC 20 /* PowerPC 32-bit. */ +#define EM_PPC64 21 /* PowerPC 64-bit. */ +#define EM_S390 22 /* IBM System/390. */ +#define EM_V800 36 /* NEC V800. */ +#define EM_FR20 37 /* Fujitsu FR20. */ +#define EM_RH32 38 /* TRW RH-32. */ +#define EM_RCE 39 /* Motorola RCE. */ +#define EM_ARM 40 /* ARM. */ +#define EM_SH 42 /* Hitachi SH. */ +#define EM_SPARCV9 43 /* SPARC v9 64-bit. */ +#define EM_TRICORE 44 /* Siemens TriCore embedded processor. */ +#define EM_ARC 45 /* Argonaut RISC Core. */ +#define EM_H8_300 46 /* Hitachi H8/300. */ +#define EM_H8_300H 47 /* Hitachi H8/300H. */ +#define EM_H8S 48 /* Hitachi H8S. */ +#define EM_H8_500 49 /* Hitachi H8/500. */ +#define EM_IA_64 50 /* Intel IA-64 Processor. */ +#define EM_MIPS_X 51 /* Stanford MIPS-X. */ +#define EM_COLDFIRE 52 /* Motorola ColdFire. */ +#define EM_68HC12 53 /* Motorola M68HC12. */ +#define EM_MMA 54 /* Fujitsu MMA. */ +#define EM_PCP 55 /* Siemens PCP. */ +#define EM_NCPU 56 /* Sony nCPU. */ +#define EM_NDR1 57 /* Denso NDR1 microprocessor. */ +#define EM_STARCORE 58 /* Motorola Star*Core processor. */ +#define EM_ME16 59 /* Toyota ME16 processor. */ +#define EM_ST100 60 /* STMicroelectronics ST100 processor. */ +#define EM_TINYJ 61 /* Advanced Logic Corp. TinyJ processor. */ +#define EM_X86_64 62 /* Advanced Micro Devices x86-64 */ + +/* Non-standard or deprecated. */ +#define EM_486 6 /* Intel i486. */ +#define EM_MIPS_RS4_BE 10 /* MIPS R4000 Big-Endian */ +#define EM_ALPHA_STD 41 /* Digital Alpha (standard value). */ +#define EM_ALPHA 0x9026 /* Alpha (written in the absence of an ABI) */ + +/* Special section indexes. */ +#define SHN_UNDEF 0 /* Undefined, missing, irrelevant. */ +#define SHN_LORESERVE 0xff00 /* First of reserved range. */ +#define SHN_LOPROC 0xff00 /* First processor-specific. */ +#define SHN_HIPROC 0xff1f /* Last processor-specific. */ +#define SHN_LOOS 0xff20 /* First operating system-specific. */ +#define SHN_HIOS 0xff3f /* Last operating system-specific. */ +#define SHN_ABS 0xfff1 /* Absolute values. */ +#define SHN_COMMON 0xfff2 /* Common data. */ +#define SHN_XINDEX 0xffff /* Escape -- index stored elsewhere. */ +#define SHN_HIRESERVE 0xffff /* Last of reserved range. */ + +/* sh_type */ +#define SHT_NULL 0 /* inactive */ +#define SHT_PROGBITS 1 /* program defined information */ +#define SHT_SYMTAB 2 /* symbol table section */ +#define SHT_STRTAB 3 /* string table section */ +#define SHT_RELA 4 /* relocation section with addends */ +#define SHT_HASH 5 /* symbol hash table section */ +#define SHT_DYNAMIC 6 /* dynamic section */ +#define SHT_NOTE 7 /* note section */ +#define SHT_NOBITS 8 /* no space section */ +#define SHT_REL 9 /* relocation section - no addends */ +#define SHT_SHLIB 10 /* reserved - purpose unknown */ +#define SHT_DYNSYM 11 /* dynamic symbol table section */ +#define SHT_INIT_ARRAY 14 /* Initialization function pointers. */ +#define SHT_FINI_ARRAY 15 /* Termination function pointers. */ +#define SHT_PREINIT_ARRAY 16 /* Pre-initialization function ptrs. */ +#define SHT_GROUP 17 /* Section group. */ +#define SHT_SYMTAB_SHNDX 18 /* Section indexes (see SHN_XINDEX). */ +#define SHT_LOOS 0x60000000 /* First of OS specific semantics */ +#define SHT_HIOS 0x6fffffff /* Last of OS specific semantics */ +#define SHT_GNU_VERDEF 0x6ffffffd +#define SHT_GNU_VERNEED 0x6ffffffe +#define SHT_GNU_VERSYM 0x6fffffff +#define SHT_LOPROC 0x70000000 /* reserved range for processor */ +#define SHT_HIPROC 0x7fffffff /* specific section header types */ +#define SHT_LOUSER 0x80000000 /* reserved range for application */ +#define SHT_HIUSER 0xffffffff /* specific indexes */ + +/* Flags for sh_flags. */ +#define SHF_WRITE 0x1 /* Section contains writable data. */ +#define SHF_ALLOC 0x2 /* Section occupies memory. */ +#define SHF_EXECINSTR 0x4 /* Section contains instructions. */ +#define SHF_MERGE 0x10 /* Section may be merged. */ +#define SHF_STRINGS 0x20 /* Section contains strings. */ +#define SHF_INFO_LINK 0x40 /* sh_info holds section index. */ +#define SHF_LINK_ORDER 0x80 /* Special ordering requirements. */ +#define SHF_OS_NONCONFORMING 0x100 /* OS-specific processing required. */ +#define SHF_GROUP 0x200 /* Member of section group. */ +#define SHF_TLS 0x400 /* Section contains TLS data. */ +#define SHF_MASKOS 0x0ff00000 /* OS-specific semantics. */ +#define SHF_MASKPROC 0xf0000000 /* Processor-specific semantics. */ + +/* Values for p_type. */ +#define PT_NULL 0 /* Unused entry. */ +#define PT_LOAD 1 /* Loadable segment. */ +#define PT_DYNAMIC 2 /* Dynamic linking information segment. */ +#define PT_INTERP 3 /* Pathname of interpreter. */ +#define PT_NOTE 4 /* Auxiliary information. */ +#define PT_SHLIB 5 /* Reserved (not used). */ +#define PT_PHDR 6 /* Location of program header itself. */ +#define PT_TLS 7 /* Thread local storage segment */ +#define PT_LOOS 0x60000000 /* First OS-specific. */ +#define PT_HIOS 0x6fffffff /* Last OS-specific. */ +#define PT_LOPROC 0x70000000 /* First processor-specific type. */ +#define PT_HIPROC 0x7fffffff /* Last processor-specific type. */ +#define PT_GNU_STACK 0x6474e551 + +/* Values for p_flags. */ +#define PF_X 0x1 /* Executable. */ +#define PF_W 0x2 /* Writable. */ +#define PF_R 0x4 /* Readable. */ +#define PF_MASKOS 0x0ff00000 /* Operating system-specific. */ +#define PF_MASKPROC 0xf0000000 /* Processor-specific. */ + +/* Values for d_tag. */ +#define DT_NULL 0 /* Terminating entry. */ +/* String table offset of a needed shared library. */ +#define DT_NEEDED 1 +#define DT_PLTRELSZ 2 /* Total size in bytes of PLT relocations. */ +#define DT_PLTGOT 3 /* Processor-dependent address. */ +#define DT_HASH 4 /* Address of symbol hash table. */ +#define DT_STRTAB 5 /* Address of string table. */ +#define DT_SYMTAB 6 /* Address of symbol table. */ +#define DT_RELA 7 /* Address of ElfNN_Rela relocations. */ +#define DT_RELASZ 8 /* Total size of ElfNN_Rela relocations. */ +#define DT_RELAENT 9 /* Size of each ElfNN_Rela relocation entry. */ +#define DT_STRSZ 10 /* Size of string table. */ +#define DT_SYMENT 11 /* Size of each symbol table entry. */ +#define DT_INIT 12 /* Address of initialization function. */ +#define DT_FINI 13 /* Address of finalization function. */ +/* String table offset of shared object name. */ +#define DT_SONAME 14 +#define DT_RPATH 15 /* String table offset of library path. [sup] */ +#define DT_SYMBOLIC 16 /* Indicates "symbolic" linking. [sup] */ +#define DT_REL 17 /* Address of ElfNN_Rel relocations. */ +#define DT_RELSZ 18 /* Total size of ElfNN_Rel relocations. */ +#define DT_RELENT 19 /* Size of each ElfNN_Rel relocation. */ +#define DT_PLTREL 20 /* Type of relocation used for PLT. */ +#define DT_DEBUG 21 /* Reserved (not used). */ +/* Indicates there may be relocations in non-writable segments. [sup] */ +#define DT_TEXTREL 22 +#define DT_JMPREL 23 /* Address of PLT relocations. */ +#define DT_BIND_NOW 24 /* [sup] */ +/* Address of the array of pointers to initialization functions */ +#define DT_INIT_ARRAY 25 +/* Address of the array of pointers to termination functions */ +#define DT_FINI_ARRAY 26 +/* Size in bytes of the array of initialization functions. */ +#define DT_INIT_ARRAYSZ 27 +/* Size in bytes of the array of terminationfunctions. */ +#define DT_FINI_ARRAYSZ 28 +/* String table offset of a null-terminated library search path string. */ +#define DT_RUNPATH 29 +#define DT_FLAGS 30 /* Object specific flag values. */ +/* Values greater than or equal to DT_ENCODING and less than + DT_LOOS follow the rules for the interpretation of the d_un + union as follows: even == 'd_ptr', even == 'd_val' or none */ +#define DT_ENCODING 32 +/* Address of the array of pointers to pre-initialization functions. */ +#define DT_PREINIT_ARRAY 32 +/* Size in bytes of the array of pre-initialization functions. */ +#define DT_PREINIT_ARRAYSZ 33 +#define DT_LOOS 0x6000000d /* First OS-specific */ +#define DT_HIOS 0x6ffff000 /* Last OS-specific */ +#define DT_LOPROC 0x70000000 /* First processor-specific type. */ +#define DT_HIPROC 0x7fffffff /* Last processor-specific type. */ + +#define DT_VERNEED 0x6ffffffe +#define DT_VERNEEDNUM 0x6fffffff +#define DT_VERSYM 0x6ffffff0 + +/* Values for DT_FLAGS */ +/* Indicates that the object being loaded may make reference to + the $ORIGIN substitution string */ +#define DF_ORIGIN 0x0001 +#define DF_SYMBOLIC 0x0002 /* Indicates "symbolic" linking. */ +/* Indicates there may be relocations in non-writable segments. */ +#define DF_TEXTREL 0x0004 +/* Indicates that the dynamic linker should process all + relocations for the object containing this entry before + transferring control to the program. */ +#define DF_BIND_NOW 0x0008 +/* Indicates that the shared object or executable contains code + using a static thread-local storage scheme. */ +#define DF_STATIC_TLS 0x0010 + +/* Values for n_type. Used in core files. */ +#define NT_PRSTATUS 1 /* Process status. */ +#define NT_FPREGSET 2 /* Floating point registers. */ +#define NT_PRPSINFO 3 /* Process state info. */ + +/* Symbol Binding - ELFNN_ST_BIND - st_info */ +#define STB_LOCAL 0 /* Local symbol */ +#define STB_GLOBAL 1 /* Global symbol */ +#define STB_WEAK 2 /* like global - lower precedence */ +#define STB_LOOS 10 /* Reserved range for operating system */ +#define STB_HIOS 12 /* specific semantics. */ +#define STB_LOPROC 13 /* reserved range for processor */ +#define STB_HIPROC 15 /* specific semantics. */ + +/* Symbol type - ELFNN_ST_TYPE - st_info */ +#define STT_NOTYPE 0 /* Unspecified type. */ +#define STT_OBJECT 1 /* Data object. */ +#define STT_FUNC 2 /* Function. */ +#define STT_SECTION 3 /* Section. */ +#define STT_FILE 4 /* Source file. */ +#define STT_COMMON 5 /* Uninitialized common block. */ +#define STT_TLS 6 /* TLS object. */ +#define STT_LOOS 10 /* Reserved range for operating system */ +#define STT_HIOS 12 /* specific semantics. */ +#define STT_LOPROC 13 /* reserved range for processor */ +#define STT_HIPROC 15 /* specific semantics. */ + +/* Symbol visibility - ELFNN_ST_VISIBILITY - st_other */ +#define STV_DEFAULT 0x0 /* Default visibility (see binding). */ +#define STV_INTERNAL 0x1 /* Special meaning in relocatable objects. */ +#define STV_HIDDEN 0x2 /* Not visible. */ +#define STV_PROTECTED 0x3 /* Visible but not preemptible. */ + +/* Special symbol table indexes. */ +#define STN_UNDEF 0 /* Undefined symbol index. */ + +/* + * ELF definitions common to all 32-bit architectures. + */ + +typedef uint32 Elf32_Addr; +typedef uint16 Elf32_Half; +typedef uint32 Elf32_Off; +typedef int32 Elf32_Sword; +typedef uint32 Elf32_Word; + +typedef Elf32_Word Elf32_Hashelt; + +/* Non-standard class-dependent datatype used for abstraction. */ +typedef Elf32_Word Elf32_Size; +typedef Elf32_Sword Elf32_Ssize; + +/* + * ELF header. + */ + +typedef struct { + unsigned char ident[EI_NIDENT]; /* File identification. */ + Elf32_Half type; /* File type. */ + Elf32_Half machine; /* Machine architecture. */ + Elf32_Word version; /* ELF format version. */ + Elf32_Addr entry; /* Entry point. */ + Elf32_Off phoff; /* Program header file offset. */ + Elf32_Off shoff; /* Section header file offset. */ + Elf32_Word flags; /* Architecture-specific flags. */ + Elf32_Half ehsize; /* Size of ELF header in bytes. */ + Elf32_Half phentsize; /* Size of program header entry. */ + Elf32_Half phnum; /* Number of program header entries. */ + Elf32_Half shentsize; /* Size of section header entry. */ + Elf32_Half shnum; /* Number of section header entries. */ + Elf32_Half shstrndx; /* Section name strings section. */ +} Elf32_Ehdr; + +/* + * Section header. + */ + +typedef struct { + Elf32_Word name; /* Section name (index into the + section header string table). */ + Elf32_Word type; /* Section type. */ + Elf32_Word flags; /* Section flags. */ + Elf32_Addr vaddr; /* Address in memory image. */ + Elf32_Off off; /* Offset in file. */ + Elf32_Word size; /* Size in bytes. */ + Elf32_Word link; /* Index of a related section. */ + Elf32_Word info; /* Depends on section type. */ + Elf32_Word addralign; /* Alignment in bytes. */ + Elf32_Word entsize; /* Size of each entry in section. */ +} Elf32_Shdr; + +/* + * Program header. + */ + +typedef struct { + Elf32_Word type; /* Entry type. */ + Elf32_Off off; /* File offset of contents. */ + Elf32_Addr vaddr; /* Virtual address in memory image. */ + Elf32_Addr paddr; /* Physical address (not used). */ + Elf32_Word filesz; /* Size of contents in file. */ + Elf32_Word memsz; /* Size of contents in memory. */ + Elf32_Word flags; /* Access permission flags. */ + Elf32_Word align; /* Alignment in memory and file. */ +} Elf32_Phdr; + +/* + * Dynamic structure. The ".dynamic" section contains an array of them. + */ + +typedef struct { + Elf32_Sword d_tag; /* Entry type. */ + union { + Elf32_Word d_val; /* Integer value. */ + Elf32_Addr d_ptr; /* Address value. */ + } d_un; +} Elf32_Dyn; + +/* + * Relocation entries. + */ + +/* Relocations that don't need an addend field. */ +typedef struct { + Elf32_Addr off; /* Location to be relocated. */ + Elf32_Word info; /* Relocation type and symbol index. */ +} Elf32_Rel; + +/* Relocations that need an addend field. */ +typedef struct { + Elf32_Addr off; /* Location to be relocated. */ + Elf32_Word info; /* Relocation type and symbol index. */ + Elf32_Sword addend; /* Addend. */ +} Elf32_Rela; + +/* Macros for accessing the fields of r_info. */ +#define ELF32_R_SYM(info) ((info) >> 8) +#define ELF32_R_TYPE(info) ((unsigned char)(info)) + +/* Macro for constructing r_info from field values. */ +#define ELF32_R_INFO(sym, type) (((sym) << 8) + (unsigned char)(type)) + +/* + * Relocation types. + */ + +#define R_X86_64_NONE 0 /* No relocation. */ +#define R_X86_64_64 1 /* Add 64 bit symbol value. */ +#define R_X86_64_PC32 2 /* PC-relative 32 bit signed sym value. */ +#define R_X86_64_GOT32 3 /* PC-relative 32 bit GOT offset. */ +#define R_X86_64_PLT32 4 /* PC-relative 32 bit PLT offset. */ +#define R_X86_64_COPY 5 /* Copy data from shared object. */ +#define R_X86_64_GLOB_DAT 6 /* Set GOT entry to data address. */ +#define R_X86_64_JMP_SLOT 7 /* Set GOT entry to code address. */ +#define R_X86_64_RELATIVE 8 /* Add load address of shared object. */ +#define R_X86_64_GOTPCREL 9 /* Add 32 bit signed pcrel offset to GOT. */ +#define R_X86_64_32 10 /* Add 32 bit zero extended symbol value */ +#define R_X86_64_32S 11 /* Add 32 bit sign extended symbol value */ +#define R_X86_64_16 12 /* Add 16 bit zero extended symbol value */ +#define R_X86_64_PC16 13 /* Add 16 bit signed extended pc relative symbol value */ +#define R_X86_64_8 14 /* Add 8 bit zero extended symbol value */ +#define R_X86_64_PC8 15 /* Add 8 bit signed extended pc relative symbol value */ +#define R_X86_64_DTPMOD64 16 /* ID of module containing symbol */ +#define R_X86_64_DTPOFF64 17 /* Offset in TLS block */ +#define R_X86_64_TPOFF64 18 /* Offset in static TLS block */ +#define R_X86_64_TLSGD 19 /* PC relative offset to GD GOT entry */ +#define R_X86_64_TLSLD 20 /* PC relative offset to LD GOT entry */ +#define R_X86_64_DTPOFF32 21 /* Offset in TLS block */ +#define R_X86_64_GOTTPOFF 22 /* PC relative offset to IE GOT entry */ +#define R_X86_64_TPOFF32 23 /* Offset in static TLS block */ + +#define R_X86_64_COUNT 24 /* Count of defined relocation types. */ + + +#define R_ALPHA_NONE 0 /* No reloc */ +#define R_ALPHA_REFLONG 1 /* Direct 32 bit */ +#define R_ALPHA_REFQUAD 2 /* Direct 64 bit */ +#define R_ALPHA_GPREL32 3 /* GP relative 32 bit */ +#define R_ALPHA_LITERAL 4 /* GP relative 16 bit w/optimization */ +#define R_ALPHA_LITUSE 5 /* Optimization hint for LITERAL */ +#define R_ALPHA_GPDISP 6 /* Add displacement to GP */ +#define R_ALPHA_BRADDR 7 /* PC+4 relative 23 bit shifted */ +#define R_ALPHA_HINT 8 /* PC+4 relative 16 bit shifted */ +#define R_ALPHA_SREL16 9 /* PC relative 16 bit */ +#define R_ALPHA_SREL32 10 /* PC relative 32 bit */ +#define R_ALPHA_SREL64 11 /* PC relative 64 bit */ +#define R_ALPHA_OP_PUSH 12 /* OP stack push */ +#define R_ALPHA_OP_STORE 13 /* OP stack pop and store */ +#define R_ALPHA_OP_PSUB 14 /* OP stack subtract */ +#define R_ALPHA_OP_PRSHIFT 15 /* OP stack right shift */ +#define R_ALPHA_GPVALUE 16 +#define R_ALPHA_GPRELHIGH 17 +#define R_ALPHA_GPRELLOW 18 +#define R_ALPHA_IMMED_GP_16 19 +#define R_ALPHA_IMMED_GP_HI32 20 +#define R_ALPHA_IMMED_SCN_HI32 21 +#define R_ALPHA_IMMED_BR_HI32 22 +#define R_ALPHA_IMMED_LO32 23 +#define R_ALPHA_COPY 24 /* Copy symbol at runtime */ +#define R_ALPHA_GLOB_DAT 25 /* Create GOT entry */ +#define R_ALPHA_JMP_SLOT 26 /* Create PLT entry */ +#define R_ALPHA_RELATIVE 27 /* Adjust by program base */ + +#define R_ALPHA_COUNT 28 + + +#define R_ARM_NONE 0 /* No relocation. */ +#define R_ARM_PC24 1 +#define R_ARM_ABS32 2 +#define R_ARM_REL32 3 +#define R_ARM_PC13 4 +#define R_ARM_ABS16 5 +#define R_ARM_ABS12 6 +#define R_ARM_THM_ABS5 7 +#define R_ARM_ABS8 8 +#define R_ARM_SBREL32 9 +#define R_ARM_THM_PC22 10 +#define R_ARM_THM_PC8 11 +#define R_ARM_AMP_VCALL9 12 +#define R_ARM_SWI24 13 +#define R_ARM_THM_SWI8 14 +#define R_ARM_XPC25 15 +#define R_ARM_THM_XPC22 16 +#define R_ARM_COPY 20 /* Copy data from shared object. */ +#define R_ARM_GLOB_DAT 21 /* Set GOT entry to data address. */ +#define R_ARM_JUMP_SLOT 22 /* Set GOT entry to code address. */ +#define R_ARM_RELATIVE 23 /* Add load address of shared object. */ +#define R_ARM_GOTOFF 24 /* Add GOT-relative symbol address. */ +#define R_ARM_GOTPC 25 /* Add PC-relative GOT table address. */ +#define R_ARM_GOT32 26 /* Add PC-relative GOT offset. */ +#define R_ARM_PLT32 27 /* Add PC-relative PLT offset. */ +#define R_ARM_GNU_VTENTRY 100 +#define R_ARM_GNU_VTINHERIT 101 +#define R_ARM_RSBREL32 250 +#define R_ARM_THM_RPC22 251 +#define R_ARM_RREL32 252 +#define R_ARM_RABS32 253 +#define R_ARM_RPC24 254 +#define R_ARM_RBASE 255 + +#define R_ARM_COUNT 33 /* Count of defined relocation types. */ + + +#define R_386_NONE 0 /* No relocation. */ +#define R_386_32 1 /* Add symbol value. */ +#define R_386_PC32 2 /* Add PC-relative symbol value. */ +#define R_386_GOT32 3 /* Add PC-relative GOT offset. */ +#define R_386_PLT32 4 /* Add PC-relative PLT offset. */ +#define R_386_COPY 5 /* Copy data from shared object. */ +#define R_386_GLOB_DAT 6 /* Set GOT entry to data address. */ +#define R_386_JMP_SLOT 7 /* Set GOT entry to code address. */ +#define R_386_RELATIVE 8 /* Add load address of shared object. */ +#define R_386_GOTOFF 9 /* Add GOT-relative symbol address. */ +#define R_386_GOTPC 10 /* Add PC-relative GOT table address. */ +#define R_386_TLS_TPOFF 14 /* Negative offset in static TLS block */ +#define R_386_TLS_IE 15 /* Absolute address of GOT for -ve static TLS */ +#define R_386_TLS_GOTIE 16 /* GOT entry for negative static TLS block */ +#define R_386_TLS_LE 17 /* Negative offset relative to static TLS */ +#define R_386_TLS_GD 18 /* 32 bit offset to GOT (index,off) pair */ +#define R_386_TLS_LDM 19 /* 32 bit offset to GOT (index,zero) pair */ +#define R_386_TLS_GD_32 24 /* 32 bit offset to GOT (index,off) pair */ +#define R_386_TLS_GD_PUSH 25 /* pushl instruction for Sun ABI GD sequence */ +#define R_386_TLS_GD_CALL 26 /* call instruction for Sun ABI GD sequence */ +#define R_386_TLS_GD_POP 27 /* popl instruction for Sun ABI GD sequence */ +#define R_386_TLS_LDM_32 28 /* 32 bit offset to GOT (index,zero) pair */ +#define R_386_TLS_LDM_PUSH 29 /* pushl instruction for Sun ABI LD sequence */ +#define R_386_TLS_LDM_CALL 30 /* call instruction for Sun ABI LD sequence */ +#define R_386_TLS_LDM_POP 31 /* popl instruction for Sun ABI LD sequence */ +#define R_386_TLS_LDO_32 32 /* 32 bit offset from start of TLS block */ +#define R_386_TLS_IE_32 33 /* 32 bit offset to GOT static TLS offset entry */ +#define R_386_TLS_LE_32 34 /* 32 bit offset within static TLS block */ +#define R_386_TLS_DTPMOD32 35 /* GOT entry containing TLS index */ +#define R_386_TLS_DTPOFF32 36 /* GOT entry containing TLS offset */ +#define R_386_TLS_TPOFF32 37 /* GOT entry of -ve static TLS offset */ + +#define R_386_COUNT 38 /* Count of defined relocation types. */ + +#define R_PPC_NONE 0 /* No relocation. */ +#define R_PPC_ADDR32 1 +#define R_PPC_ADDR24 2 +#define R_PPC_ADDR16 3 +#define R_PPC_ADDR16_LO 4 +#define R_PPC_ADDR16_HI 5 +#define R_PPC_ADDR16_HA 6 +#define R_PPC_ADDR14 7 +#define R_PPC_ADDR14_BRTAKEN 8 +#define R_PPC_ADDR14_BRNTAKEN 9 +#define R_PPC_REL24 10 +#define R_PPC_REL14 11 +#define R_PPC_REL14_BRTAKEN 12 +#define R_PPC_REL14_BRNTAKEN 13 +#define R_PPC_GOT16 14 +#define R_PPC_GOT16_LO 15 +#define R_PPC_GOT16_HI 16 +#define R_PPC_GOT16_HA 17 +#define R_PPC_PLTREL24 18 +#define R_PPC_COPY 19 +#define R_PPC_GLOB_DAT 20 +#define R_PPC_JMP_SLOT 21 +#define R_PPC_RELATIVE 22 +#define R_PPC_LOCAL24PC 23 +#define R_PPC_UADDR32 24 +#define R_PPC_UADDR16 25 +#define R_PPC_REL32 26 +#define R_PPC_PLT32 27 +#define R_PPC_PLTREL32 28 +#define R_PPC_PLT16_LO 29 +#define R_PPC_PLT16_HI 30 +#define R_PPC_PLT16_HA 31 +#define R_PPC_SDAREL16 32 +#define R_PPC_SECTOFF 33 +#define R_PPC_SECTOFF_LO 34 +#define R_PPC_SECTOFF_HI 35 +#define R_PPC_SECTOFF_HA 36 + +#define R_PPC_COUNT 37 /* Count of defined relocation types. */ + +#define R_PPC_TLS 67 +#define R_PPC_DTPMOD32 68 +#define R_PPC_TPREL16 69 +#define R_PPC_TPREL16_LO 70 +#define R_PPC_TPREL16_HI 71 +#define R_PPC_TPREL16_HA 72 +#define R_PPC_TPREL32 73 +#define R_PPC_DTPREL16 74 +#define R_PPC_DTPREL16_LO 75 +#define R_PPC_DTPREL16_HI 76 +#define R_PPC_DTPREL16_HA 77 +#define R_PPC_DTPREL32 78 +#define R_PPC_GOT_TLSGD16 79 +#define R_PPC_GOT_TLSGD16_LO 80 +#define R_PPC_GOT_TLSGD16_HI 81 +#define R_PPC_GOT_TLSGD16_HA 82 +#define R_PPC_GOT_TLSLD16 83 +#define R_PPC_GOT_TLSLD16_LO 84 +#define R_PPC_GOT_TLSLD16_HI 85 +#define R_PPC_GOT_TLSLD16_HA 86 +#define R_PPC_GOT_TPREL16 87 +#define R_PPC_GOT_TPREL16_LO 88 +#define R_PPC_GOT_TPREL16_HI 89 +#define R_PPC_GOT_TPREL16_HA 90 + +#define R_PPC_EMB_NADDR32 101 +#define R_PPC_EMB_NADDR16 102 +#define R_PPC_EMB_NADDR16_LO 103 +#define R_PPC_EMB_NADDR16_HI 104 +#define R_PPC_EMB_NADDR16_HA 105 +#define R_PPC_EMB_SDAI16 106 +#define R_PPC_EMB_SDA2I16 107 +#define R_PPC_EMB_SDA2REL 108 +#define R_PPC_EMB_SDA21 109 +#define R_PPC_EMB_MRKREF 110 +#define R_PPC_EMB_RELSEC16 111 +#define R_PPC_EMB_RELST_LO 112 +#define R_PPC_EMB_RELST_HI 113 +#define R_PPC_EMB_RELST_HA 114 +#define R_PPC_EMB_BIT_FLD 115 +#define R_PPC_EMB_RELSDA 116 + + /* Count of defined relocation types. */ +#define R_PPC_EMB_COUNT (R_PPC_EMB_RELSDA - R_PPC_EMB_NADDR32 + 1) + + +#define R_SPARC_NONE 0 +#define R_SPARC_8 1 +#define R_SPARC_16 2 +#define R_SPARC_32 3 +#define R_SPARC_DISP8 4 +#define R_SPARC_DISP16 5 +#define R_SPARC_DISP32 6 +#define R_SPARC_WDISP30 7 +#define R_SPARC_WDISP22 8 +#define R_SPARC_HI22 9 +#define R_SPARC_22 10 +#define R_SPARC_13 11 +#define R_SPARC_LO10 12 +#define R_SPARC_GOT10 13 +#define R_SPARC_GOT13 14 +#define R_SPARC_GOT22 15 +#define R_SPARC_PC10 16 +#define R_SPARC_PC22 17 +#define R_SPARC_WPLT30 18 +#define R_SPARC_COPY 19 +#define R_SPARC_GLOB_DAT 20 +#define R_SPARC_JMP_SLOT 21 +#define R_SPARC_RELATIVE 22 +#define R_SPARC_UA32 23 +#define R_SPARC_PLT32 24 +#define R_SPARC_HIPLT22 25 +#define R_SPARC_LOPLT10 26 +#define R_SPARC_PCPLT32 27 +#define R_SPARC_PCPLT22 28 +#define R_SPARC_PCPLT10 29 +#define R_SPARC_10 30 +#define R_SPARC_11 31 +#define R_SPARC_64 32 +#define R_SPARC_OLO10 33 +#define R_SPARC_HH22 34 +#define R_SPARC_HM10 35 +#define R_SPARC_LM22 36 +#define R_SPARC_PC_HH22 37 +#define R_SPARC_PC_HM10 38 +#define R_SPARC_PC_LM22 39 +#define R_SPARC_WDISP16 40 +#define R_SPARC_WDISP19 41 +#define R_SPARC_GLOB_JMP 42 +#define R_SPARC_7 43 +#define R_SPARC_5 44 +#define R_SPARC_6 45 +#define R_SPARC_DISP64 46 +#define R_SPARC_PLT64 47 +#define R_SPARC_HIX22 48 +#define R_SPARC_LOX10 49 +#define R_SPARC_H44 50 +#define R_SPARC_M44 51 +#define R_SPARC_L44 52 +#define R_SPARC_REGISTER 53 +#define R_SPARC_UA64 54 +#define R_SPARC_UA16 55 + + +/* + * Magic number for the elf trampoline, chosen wisely to be an immediate + * value. + */ +#define ARM_MAGIC_TRAMP_NUMBER 0x5c000003 + + +/* + * Symbol table entries. + */ + +typedef struct { + Elf32_Word name; /* String table index of name. */ + Elf32_Addr value; /* Symbol value. */ + Elf32_Word size; /* Size of associated object. */ + unsigned char info; /* Type and binding information. */ + unsigned char other; /* Reserved (not used). */ + Elf32_Half shndx; /* Section index of symbol. */ +} Elf32_Sym; + +/* Macros for accessing the fields of st_info. */ +#define ELF32_ST_BIND(info) ((info) >> 4) +#define ELF32_ST_TYPE(info) ((info) & 0xf) + +/* Macro for constructing st_info from field values. */ +#define ELF32_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) + +/* Macro for accessing the fields of st_other. */ +#define ELF32_ST_VISIBILITY(oth) ((oth) & 0x3) + +/* + * ELF definitions common to all 64-bit architectures. + */ + +typedef uint64 Elf64_Addr; +typedef uint16 Elf64_Half; +typedef uint64 Elf64_Off; +typedef int32 Elf64_Sword; +typedef int64 Elf64_Sxword; +typedef uint32 Elf64_Word; +typedef uint64 Elf64_Xword; + +/* + * Types of dynamic symbol hash table bucket and chain elements. + * + * This is inconsistent among 64 bit architectures, so a machine dependent + * typedef is required. + */ + +#ifdef __alpha__ +typedef Elf64_Off Elf64_Hashelt; +#else +typedef Elf64_Word Elf64_Hashelt; +#endif + +/* Non-standard class-dependent datatype used for abstraction. */ +typedef Elf64_Xword Elf64_Size; +typedef Elf64_Sxword Elf64_Ssize; + +/* + * ELF header. + */ + +typedef struct { + unsigned char ident[EI_NIDENT]; /* File identification. */ + Elf64_Half type; /* File type. */ + Elf64_Half machine; /* Machine architecture. */ + Elf64_Word version; /* ELF format version. */ + Elf64_Addr entry; /* Entry point. */ + Elf64_Off phoff; /* Program header file offset. */ + Elf64_Off shoff; /* Section header file offset. */ + Elf64_Word flags; /* Architecture-specific flags. */ + Elf64_Half ehsize; /* Size of ELF header in bytes. */ + Elf64_Half phentsize; /* Size of program header entry. */ + Elf64_Half phnum; /* Number of program header entries. */ + Elf64_Half shentsize; /* Size of section header entry. */ + Elf64_Half shnum; /* Number of section header entries. */ + Elf64_Half shstrndx; /* Section name strings section. */ +} Elf64_Ehdr; + +/* + * Section header. + */ + +typedef struct { + Elf64_Word name; /* Section name (index into the + section header string table). */ + Elf64_Word type; /* Section type. */ + Elf64_Xword flags; /* Section flags. */ + Elf64_Addr addr; /* Address in memory image. */ + Elf64_Off off; /* Offset in file. */ + Elf64_Xword size; /* Size in bytes. */ + Elf64_Word link; /* Index of a related section. */ + Elf64_Word info; /* Depends on section type. */ + Elf64_Xword addralign; /* Alignment in bytes. */ + Elf64_Xword entsize; /* Size of each entry in section. */ +} Elf64_Shdr; + +/* + * Program header. + */ + +typedef struct { + Elf64_Word type; /* Entry type. */ + Elf64_Word flags; /* Access permission flags. */ + Elf64_Off off; /* File offset of contents. */ + Elf64_Addr vaddr; /* Virtual address in memory image. */ + Elf64_Addr paddr; /* Physical address (not used). */ + Elf64_Xword filesz; /* Size of contents in file. */ + Elf64_Xword memsz; /* Size of contents in memory. */ + Elf64_Xword align; /* Alignment in memory and file. */ +} Elf64_Phdr; + +/* + * Dynamic structure. The ".dynamic" section contains an array of them. + */ + +typedef struct { + Elf64_Sxword d_tag; /* Entry type. */ + union { + Elf64_Xword d_val; /* Integer value. */ + Elf64_Addr d_ptr; /* Address value. */ + } d_un; +} Elf64_Dyn; + +/* + * Relocation entries. + */ + +/* Relocations that don't need an addend field. */ +typedef struct { + Elf64_Addr off; /* Location to be relocated. */ + Elf64_Xword info; /* Relocation type and symbol index. */ +} Elf64_Rel; + +/* Relocations that need an addend field. */ +typedef struct { + Elf64_Addr off; /* Location to be relocated. */ + Elf64_Xword info; /* Relocation type and symbol index. */ + Elf64_Sxword addend; /* Addend. */ +} Elf64_Rela; + +/* Macros for accessing the fields of r_info. */ +#define ELF64_R_SYM(info) ((info) >> 32) +#define ELF64_R_TYPE(info) ((info) & 0xffffffffL) + +/* Macro for constructing r_info from field values. */ +#define ELF64_R_INFO(sym, type) ((((uint64)(sym)) << 32) + (((uint64)(type)) & 0xffffffffULL)) + +/* + * Symbol table entries. + */ + +typedef struct { + Elf64_Word name; /* String table index of name. */ + unsigned char info; /* Type and binding information. */ + unsigned char other; /* Reserved (not used). */ + Elf64_Half shndx; /* Section index of symbol. */ + Elf64_Addr value; /* Symbol value. */ + Elf64_Xword size; /* Size of associated object. */ +} Elf64_Sym; + +/* Macros for accessing the fields of st_info. */ +#define ELF64_ST_BIND(info) ((info) >> 4) +#define ELF64_ST_TYPE(info) ((info) & 0xf) + +/* Macro for constructing st_info from field values. */ +#define ELF64_ST_INFO(bind, type) (((bind) << 4) + ((type) & 0xf)) + +/* Macro for accessing the fields of st_other. */ +#define ELF64_ST_VISIBILITY(oth) ((oth) & 0x3) + +/* + * Go linker interface + */ + +#define ELF64HDRSIZE 64 +#define ELF64PHDRSIZE 56 +#define ELF64SHDRSIZE 64 +#define ELF64RELSIZE 16 +#define ELF64RELASIZE 24 +#define ELF64SYMSIZE sizeof(Elf64_Sym) + +#define ELF32HDRSIZE sizeof(Elf32_Ehdr) +#define ELF32PHDRSIZE sizeof(Elf32_Phdr) +#define ELF32SHDRSIZE sizeof(Elf32_Shdr) +#define ELF32SYMSIZE sizeof(Elf32_Sym) +#define ELF32RELSIZE 8 + +/* + * The interface uses the 64-bit structures always, + * to avoid code duplication. The writers know how to + * marshal a 32-bit representation from the 64-bit structure. + */ +typedef Elf64_Ehdr ElfEhdr; +typedef Elf64_Shdr ElfShdr; +typedef Elf64_Phdr ElfPhdr; + +void elfinit(void); +ElfEhdr *getElfEhdr(void); +ElfShdr *newElfShstrtab(vlong); +ElfShdr *newElfShdr(vlong); +ElfPhdr *newElfPhdr(void); +uint32 elfwritehdr(void); +uint32 elfwritephdrs(void); +uint32 elfwriteshdrs(void); +void elfwritedynent(Sym*, int, uint64); +void elfwritedynentsym(Sym*, int, Sym*); +void elfwritedynentsymsize(Sym*, int, Sym*); +uint32 elfhash(uchar*); +uint64 startelf(void); +uint64 endelf(void); +extern int numelfphdr; +extern int numelfshdr; +extern int iself; +extern int elfverneed; +int elfwriteinterp(void); +void elfinterp(ElfShdr*, uint64, char*); +void elfdynhash(void); +ElfPhdr* elfphload(Segment*); +ElfShdr* elfshbits(Section*); +void elfsetstring(char*, int); +void elfaddverneed(Sym*); + +EXTERN int elfstrsize; +EXTERN char* elfstrdat; +EXTERN int elftextsh; + +/* + * Total amount of space to reserve at the start of the file + * for Header, PHeaders, SHeaders, and interp. + * May waste some. + * On FreeBSD, cannot be larger than a page. + */ +#define ELFRESERVE 3072 |